U.S. patent number 10,384,298 [Application Number 15/712,272] was granted by the patent office on 2019-08-20 for weld gun part clamp device and method.
This patent grant is currently assigned to Comau LLC. The grantee listed for this patent is Comau LLC. Invention is credited to Velibor Kilibarda.
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United States Patent |
10,384,298 |
Kilibarda |
August 20, 2019 |
Weld gun part clamp device and method
Abstract
A combination component handling and connecting device
connectable to a multi-axis robot for use in moving and connecting
components and subassemblies includes a housing and an actuator
fixedly connected to the housing. The actuator includes an
actuating link movable from a first position to a second position.
Connected to the actuating link is an end effector for concurrent
movement with the actuating link. The component handling and
connecting device includes a clamp having a first jaw and a second
jaw. The second jaw is connected to the actuating link for
selectively moving the second jaw toward the first jaw operative to
engage a component.
Inventors: |
Kilibarda; Velibor (Bloomfield,
MI) |
Applicant: |
Name |
City |
State |
Country |
Type |
Comau LLC |
Southfield |
MI |
US |
|
|
Assignee: |
Comau LLC (Southfield,
MI)
|
Family
ID: |
47879246 |
Appl.
No.: |
15/712,272 |
Filed: |
September 22, 2017 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20180043462 A1 |
Feb 15, 2018 |
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Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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14576377 |
Dec 19, 2014 |
9796041 |
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13621509 |
Feb 10, 2015 |
8950065 |
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61536090 |
Sep 19, 2011 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B23K
11/314 (20130101); B23K 11/115 (20130101); B23K
11/315 (20130101); Y10T 29/5313 (20150115); Y10S
901/30 (20130101); Y10T 403/7007 (20150115); Y10T
74/20335 (20150115); Y10T 403/7073 (20150115); F16B
2200/10 (20180801); Y10S 901/50 (20130101); Y10T
29/49826 (20150115); Y10T 74/20305 (20150115); Y10S
901/27 (20130101); Y10T 29/4984 (20150115); Y10T
29/49815 (20150115); Y10T 29/53174 (20150115); Y10S
483/901 (20130101); Y10S 901/29 (20130101); Y10T
403/7005 (20150115); Y10S 901/28 (20130101); Y10T
29/49075 (20150115); Y10T 29/4913 (20150115); Y10T
74/20311 (20150115); Y10T 74/20329 (20150115); Y10T
483/17 (20150115) |
Current International
Class: |
B23K
11/00 (20060101); B23K 11/31 (20060101); B23K
11/11 (20060101) |
Field of
Search: |
;219/86.1,86.33,86.32,86.25 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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101316686 |
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Dec 2008 |
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CN |
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101668609 |
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Mar 2010 |
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CN |
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101979208 |
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Feb 2011 |
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CN |
|
10026204 |
|
Jan 1998 |
|
JP |
|
2010/111159 |
|
Sep 2010 |
|
WO |
|
Primary Examiner: Ross; Dana
Assistant Examiner: Maye; Ayub A
Attorney, Agent or Firm: Young Basile Hanlon &
MacFarlane, P.C.
Parent Case Text
CROSS-REFERENCE TO RELATED-APPLICATION
This divisional application claims priority benefit to divisional
U.S. patent application Ser. No. 14/576,377 filed Dec. 19, 2014
which is a divisional application of U.S. patent application Ser.
No. 13/621,509 filed Sep. 17, 2012, now U.S. Pat. No. 8,950,065,
which is a non-provisional application of U.S. Provisional Patent
Application Ser. No. 61/536,090, filed Sep. 19, 2011, all of which
are incorporated herein by reference in their entirety.
Claims
What is claimed is:
1. A method for component handling and welding of a first component
and a second component through use of a multi-axis robot having a
welding end effector, the welding end effector having a first arm,
a second arm connected to the first arm, a first jaw connected to
the second arm, and a second jaw defined by the first and the
second arms, the method comprising: linearly moving a welding end
effector actuator fixedly connected to the first arm of the welding
end effector in a first direction thereby linearly moving the first
arm of the welding end effector defining a portion of the second
jaw to an open position of the second jaw defining a clamp throat;
maneuvering the welding end effector to position the first and the
second components in the clamp throat; at least one of the first or
the second components abuttingly engaging the first jaw thereby
positioning the first and the second components between the first
and the second jaws, wherein the first jaw comprises a support
member fixedly connected to the second arm for holding at least one
of the first or the second components; linearly moving the welding
end effector actuator in a second direction to a closed position of
the second jaw, the second jaw clampingly engaging the first and
the second components together; and fixedly connecting through
welding the first and the second components together by the second
jaw positioned in the closed position of the second jaw.
2. The method of claim 1 wherein moving the welding end effector
actuator to the closed position of the second jaw and fixedly
connecting the first and the second components together comprises
only a single welding end effector actuator.
3. The method of claim 1 wherein the welding end effector is a
resistance spot welding end effector wherein the first arm is a
first weld arm and the second arm is a second weld arm, the second
jaw further comprising a first welding tip on a distal end of the
first weld arm and the second jaw further comprising a second
welding tip on the second weld arm opposing the first welding tip,
wherein the step of welding comprises resistance spot welding.
4. A method for component handling and welding of a first component
and a second component through use of a multi-axis robot having a
resistance spot welding end effector, the resistance spot welding
end effector having a first weld arm, a second weld arm, a first
jaw, and a second jaw defined by the first and the second weld
arms, the method comprising: linearly moving a single welding gun
end effector actuator fixedly connected to the first weld arm of
the resistance spot welding end effector in a first direction
thereby linearly moving the first weld arm of the resistance spot
welding end effector first weld arm and defining a portion of the
second jaw to an open position of the second jaw defining a clamp
throat; the first jaw comprising a support member fixedly connected
to the second weld arm of the resistance spot welding end effector,
the first jaw positioned opposite the second jaw and within the
clamp throat; maneuvering the end effector to position the first
and the second components in the clamp throat; at least one of the
first or the second components abuttingly engaging the support
member thereby positioning the first and the second components
between the first and the second jaws; linearly moving the single
welding gun end effector actuator in a second direction to a closed
position of the second jaw, the second jaw clampingly engaging the
first and the second components together; and fixedly connecting
through resistance spot welding the first and the second components
together while the first and the second components are clampingly
engaged by the second jaw positioned in the closed position of the
second jaw, the resistance spot welding end effector selectively
operable at component handling and resistance spot welding while
utilizing the single welding gun end effector actuator.
5. The method of claim 4 wherein the support member further
comprises a seat, the method further comprising the step of
receiving a portion of the at least one of the first or the second
components in the seat to support and frictionally engage the at
least one of the first and second components from movement relative
to the support member.
6. The method of claim 5 wherein the support member comprises a
first support member and a second support member positioned on
opposing sides of the second weld arm along a lateral axis
orthogonal to the first and the second directions of the single
welding gun end effector actuator, wherein the at least one of the
first or the second components abuttingly engage both the first and
the second support members.
Description
TECHNICAL FIELD
The present invention generally relates to the field of
manufacturing.
BACKGROUND
In the manufacture and assembly of transportation vehicles, and
more specifically in an application where sheet metal vehicle
skeletal frames called body-in-white (BIW), dozens and dozens of
individual sheet metal components and subassemblies are welded or
otherwise connected together in sequential build stations
positioned along an assembly line.
In modern, high-volume facilities, hundreds of industrial,
multi-axis robots are used to move components and subassemblies
from position to position, for example, from a part bin or rack
positioned adjacent a build station to a holding fixture in the
build station where it is connected to other components positioned
in the same or different fixtures. Numerous additional industrial
robots each have a resistance spot welding gun or rivet gun
connected to a robot wrist that can be manipulated and positioned
to spot weld, rivet, join, and otherwise connect the fixtured
components at a particular build station.
In a typical prior build process, separate first robots were used
to grasp components and subassemblies and deposit those components
in a fixture or other structure in a build station for further
processing. Separate second robots with weld guns or other end
effectors, for example, adhesive applicators or other tooling, were
used to spot weld or otherwise connect the components together
before the connected subassembly can be transferred to the next
build station for further processing in a similar manner described
above.
Alternately, prior build processes have reduced the number of
robots required by using end effectors on the robots that included
both a weld gun having an actuator and a clamp or a material
handling gripper that included a separate actuator. This was
advantageous as it reduced the number of robots, but
disadvantageous as more equipment was required to be carried and
maneuvered by the robot requiring higher capacity robots to handle
the load.
It would be advantageous to have a device and system that provided
the benefits of reducing the number of robots through integration
of a weld gun and a material handling gripper on a single robot
while further reducing the amount of equipment required to operate
the separate equipment and maintain the desired independent
functions.
BRIEF SUMMARY
The inventive design includes a device and method whereby a single
actuator, such as a cylinder, serves to operate or articulate an
end effector, for example a weld gun armature, and a material
handling clamp or gripper connected to the wrist of an industrial
robot. In one example, a single robot thereby includes the
capability of a fully functional weld gun and a material handling
clamp, using a single actuator, to maneuver and connect parts and
subassemblies in a build station or along an assembly line. The
actuator includes an actuating link movable from a first position
to a second position. The end effector may be connected to the
actuating link for concurrent movement with the actuating link. The
clamp includes a first jaw and a second jaw. The second jaw is
connected to the actuating link for selectively moving the second
jaw toward the first jaw operative to engage the parts and
subassemblies.
BRIEF DESCRIPTION OF THE DRAWINGS
The description herein makes reference to the accompanying
drawings, wherein like reference numerals refer to like parts
throughout the several views, and wherein:
FIG. 1 is a schematic perspective view of an exemplary weld gun
part clamp device employed with an exemplary weld gun, the part
clamp positioned with a part gripping jaws in an open position
without a part;
FIG. 2 is a schematic perspective view of the exemplary weld gun
part clamp device of FIG. 1 with the part gripping jaws positioned
in a closed position without a part;
FIG. 3 is a schematic perspective view of the exemplary weld gun
part clamp device of FIG. 1 illustrating a part positioned in the
part clamp with the clamp jaws arranged in the open position;
FIG. 4 is a schematic perspective view of the exemplary weld gun
part clamp device of FIG. 1 illustrating the part positioned in the
part clamp with the clamp jaws arranged in the closed position to
secure the part to an end effector weld gun;
FIG. 5 is a schematic perspective view of the exemplary weld gun of
FIG. 1, wherein a weld gun armature and weld tips serve as clamp
jaws, the weld tip jaws arranged in an open position;
FIG. 6 is a schematic perspective view of the exemplary weld gun
part clamp shown in FIG. 5 illustrating the weld tip jaws in a
closed position to secure the part to an end effector weld gun;
FIG. 7 is a schematic perspective view of the exemplary resistance
spot welding gun part clamp of FIG. 1 employing alternately
configured clamp jaws arranged in an open position;
FIG. 8 is a schematic perspective view of the exemplary resistance
spot welding gun part clamp of FIG. 7 illustrating the clamp jaws
arranged in a closed position;
FIG. 9 is a schematic perspective view of an alternatively
configured exemplary resistance spot welding gun part clamp with a
weld jaw tips and part clamp arranged in an open position;
FIG. 10 is a schematic perspective view of the exemplary resistance
spot welding gun part clamp of FIG. 9 with the weld jaw tips and
part clamp arranged in a closed position;
FIG. 11 is a schematic perspective view of an alternatively
configured exemplary resistance spot welding gun part clamp with
the weld jaw tips in a closed position and part clamp arranged in
an open position;
FIG. 12 is a schematic perspective view of the exemplary resistance
spot welding gun part clamp of FIG. 11 with the weld jaw tips in an
open position and part clamp arranged in a closed position; and
FIG. 13 is a schematic perspective view of the exemplary weld gun
part clamp device of FIG. 1 employing an alternately configured
clamp jaws arranged in an open position with a part positioned in
the part clamp.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
Referring now to the discussion that follows and also to the
drawings, illustrative approaches to the disclosed systems and
methods are shown in detail. Although the drawings represent some
possible approaches, the drawings are not necessarily to scale and
certain features may be exaggerated, removed, or partially
sectioned to better illustrate and explain the present invention.
Further, the descriptions set forth herein are not intended to be
exhaustive or otherwise limit or restrict the claims to the precise
forms and configurations shown in the drawings and disclosed in the
following detailed description.
Referring to FIGS. 1-4, an example of a weld gun part clamp device
10 for use on one example of a resistance spot welding gun 12
connected to a multi-axis industrial robot for use in grasping or
clamping an exemplary part or subassembly 14 is illustrated. In the
example, and for purposes of simplicity, exemplary weld gun 12
includes a pair of spaced apart side plates 16 at least partially
defining a housing. Side plates 16 are connected together by cross
braces 18. Weld gun 12 further includes a transformer 20, an
actuator 22 having a pneumatic, electric or hydraulic actuated
actuating link or piston rod 24 connected to a first moveable weld
arm 26 having a first weld tip 28 at its distal end. Actuator 22 is
fixedly positioned relative to side plates 16, and is operable for
moving piston rod 24 axially along a longitudinal axis of piston
rod 24. First weld arm 26 is fixedly attached to piston rod 24 for
concurrent movement therewith. In the exemplary welding gun 12, a
second weld arm 30 is fixedly attached to side plates 16 and
includes a second weld tip 32 oriented to oppose first arm weld tip
28. In the example shown, first weld arm 26 and second weld arm 30
are configured to form a throat 34 defined by the weld arms and
weld tips. Piston rod 24 and first weld arm 26 are selectively
movable relative to second welding arm 30 and weld tip 32.
In a typical operation for exemplary weld gun 12, actuator piston
rod 24 is selectively moveable between a closed position, for
example, as illustrated in FIGS. 1 and 3, whereby piston rod 24 is
extended toward second weld tip 32 placing first weld tip 28 into
contact with second weld tip 32 (or close proximity thereto to
accommodate for a thicknesses of sheet metal components positioned
between the welding tips to be spot welded).
In a typical open position, for example, as illustrated in FIGS. 2
and 4, piston rod 24 is cycled to retract first weld tip 28 toward
actuator 22. In the illustrated example, actuator 22 would
typically be electronically connected to a programmable controller
and processor having preprogrammed sequences and operations to
engage and move actuator 22 and the connected robot to suit the
particular application. Further details and variations of weld gun
12 may be found in U.S. patent application Ser. Nos. 12/207,534 and
12/689,993 assigned to the present assignee of the invention, both
applications incorporated herein by reference. It shall be
understood that other weld gun configurations, such as those shown
for example in FIGS. 9-12, robot end effectors and similar
manufacturing equipment may be used in connection with the
disclosed exemplary weld gun part clamp device.
With continued reference to FIG. 1, a first example of weld gun
part clamp 36 is illustrated. In the example, clamp 36 includes a
first jaw 38 having a first jaw member 40 and a second jaw member
42 each connected to respective side plates 16 across a width of
weld gun 12 as generally illustrated. In the example, first jaw
member 40 and second jaw member 42 are elongate members rigidly
connected to side plates 16 through common fasteners 44 or another
connection mechanism, for example, welding and brazing. Jaw members
40 and 42 each include a seat 46 illustrated in the form of a
triangular notch to engage a portion of a part 14. In one example,
jaw members 44 and 46 are made from heavy gauge steel. Other
materials may also be employed. Although two separate jaws members
are illustrated, it shall be understood the jaw member may be made
from a single piece and there may be fewer or more jaw members to
constitute first jaw 38.
In the example clamp 36, a second jaw 48 positioned opposite first
jaw 38 is illustrated. In the example, second jaw 48 includes a
third jaw member 50 similar in configuration, positioned in
opposing orientation and made from similar materials as first and
second jaw members 40 and 42. In the example shown, first jaw 38
and second jaw 48 form a throat 52 between the jaws. Third jaw
member 50 is connected to actuator piston rod 24 and reciprocates
along with piston rod 24 and first weld tip 28 to close a linear
distance between first jaw 38 and second jaw 48 across throat
52.
When operating weld gun part clamp device 10 in an exemplary
application, such as a build station where part 14 (see FIGS. 3 and
4) is positioned in a storage rack adjacent an assembly line for
delivery to a welding fixture for processing, for example spot
welding the part or component 14 to a second component, a robot
operably connected to weld gun part clamp device 10 may be employed
to position weld gun 12 and clamp 36 in any three-dimensional
coordinate position adjacent part 14. Actuator 22 may be cycled to
close first weld arm 26, thereby moving second jaw 48 to an open
position, as illustrated for example in FIGS. 1 and 3, and weld
tips 28 and 32 are arranged in a closed position. The robot may be
operated to position clamp 36 relative to part 14 so that part 14
is positioned within throat 52. With part 14 positioned in throat
52, actuator 22 may be cycled to move second jaw member 42 to a
closed position, wherein part 14 is engaged and securely held by
first jaw 38 and second jaw 48 to enable the part to be moved to a
desired position within the welding fixture. To disengage clamp 36
from part 14 the process is cycled in reverse to open clamp 36.
In one exemplary operation, after part 14 is positioned within a
welding fixture, having been deposited by the robot utilizing weld
gun part clamp device 10, weld gun 12 and clamp 36, in abutting
contact with a second component for spot welding, the weld gun 12
can immediately switch operative functions and the same actuator 22
can be used to cycle weld arm 26 to spot weld part 14 through weld
tips 28 and 32. Weld gun part clamp device 10 is highly
advantageous in that device 10, while employing a single actuator
22 supported by a single robot can perform dual operations of
material handling and spot welding (or other operation depending on
the particular end effector connected to the robot). It is
understood that other parts 14, build sequences and similar
material handling operations other than that described above may be
used or employed with the weld gun part claim 10.
Referring to FIGS. 5 and 6, an alternately configured weld gun part
clamp device 54 is illustrated. Weld gun part clamp device 54 has a
similar configuration as weld gun part clamp device 10, but employs
an alternately configured weld gun part clamp 56 in place of weld
gun part clamp 36 (see FIGS. 1 and 2). Weld gun part clamp device
54 retains the existing throat 34 defined by first weld arm 26 and
second weld arm 30 of weld gun part clamp device 10 (see FIGS. 1
and 2), and weld tips 28 and 32 operate as a second jaw 55 to
engage and secure part 14 to weld gun 12 for material handling
operations. In the example, weld gun part clamp 56 includes a first
jaw 58 in the form of a support member 60 rigidly connected to
second weld arm 30, as generally illustrated. A second support
member, which may be similarly or differently configured than
support member 60, may be rigidly connected to second weld arm 30
on a side opposite support member 60. Support member 60 may include
an appropriate seat or nest 62, for example a triangular notch
similar to seat 46 in first and second jaw member 40 and 42 (see
FIGS. 1 and 2), to cradle the particular part 14 to be held.
Support member 60 may include different configuration and may be
positioned at various locations and orientations along second weld
arm 30 to suit a particular application.
As illustrated in the alternate example, second jaw 55 employs weld
tips 28 and 32 as second jaw 55 to selectively engage part 14,
thereby sandwiching part 14 in throat 34 and securing part 14 to
weld gun 12 for material handling operations suitable for the
particular application and build sequence, for example, as
generally described above. Similarly, a single actuator 22 is used
for both material handling and spot welding operations on part 14
using a single robot. It is understood that a different support
member 60, and different positions and orientations of the members
with respect to the weld arms, suitable for the particular
application may be used. Further, although a spot welding gun 12
and weld tips 28 and 32 are shown, it is understood that other end
effectors and tips suitable for the application and build process
that engage part 14 and are connected to the robot may be used.
With reference to FIGS. 7 and 8, an alternately configured weld gun
part clamp device 64 similar to weld gun part clamp device 10 is
illustrated, but includes an alternately configured weld gun part
clamp 66. Clamp 66 includes an alternately configured first jaw 68
having a first jaw member 70 and a second jaw member 72, each
connected to respective side plates 16 across a width of weld gun
12, as generally illustrated. First jaw members 70 and 72 have
their upper portions angled rearward toward a proximal end 74 of
welding gun 12 to allow for a larger or wider part 14 (not shown)
to be grasped and manipulated than the first jaw members 40 and 42
shown in FIGS. 1-4. First jaw member 70 and second jaw member 70
operate in a similar manner as first jaw member 40 and second jaw
member 42 of weld gun part clamp 36, but are differently configured
to accommodate a part configured differently from part 14. First
and second jaw members 70 and 72 are elongate members rigidly
connected to side plates 16 through common fasteners 44 or another
connection mechanism, for example, welding and brazing. Jaw members
70 and 72 each include seat 46, illustrated in the form of a
triangular notch, to engage a portion of a part. Jaw members 70 and
72 may be made from heavy gauge steel. Other materials may also be
employed. Although two separate jaws members are illustrated, it
shall be understood that jaw members may be made from a single
piece and there may be fewer or more jaw members to constitute
first jaw 68. First jaw 68 may be employed with one or more of the
spot welding guns illustrated and described throughout the
application. As can be seen, clamp 36 and the configuration of
first jaw 38 and second jaw 48 (see FIGS. 1 and 2), and connections
to a weld gun 12 or other end effectors, may be varied to suit
particular material handling and build station operations and to
accommodate particular parts and applications.
With continued reference to FIGS. 7 and 8, second jaw 48 may be
positioned opposite first jaw 68. Second jaw 48 includes third jaw
member 50 similar in configuration, positioned in opposing
orientation and made from similar materials, as first and second
jaw members 70 and 72. First jaw 68 and second jaw 48 form throat
52 between the jaws. Third jaw member 50 is connected to actuator
piston rod 24 and reciprocates along with piston rod 24 and first
weld tip 28 between a closed position to close a linear distance
between first jaw 68 and second jaw 48 across throat 52, as
illustrated in FIG. 8, and an open position to open the linear
distance between first jaw 68 and second jaw 48 across throat 52,
as illustrated in FIG. 7.
Referring to FIGS. 9 and 10, weld gun part clamp 36 may be employed
with an alternately configured welding gun alternate 76. Welding
gun 76 employs similar components and is similarly configured as
welding gun 12, and utilizes actuator 22 that includes the linearly
moving piston rod 24 illustrated in the prior examples, but employs
an alternately configured first moveable weld arm 78. First weld
arm 78 pivots about a rotational bearing 80 and axis connected to
side plates 16 toward an alternately configured fixed second weld
arm 82, as generally illustrated in FIGS. 9 and 10. FIG. 9 shows
actuator cylinder 22 extended to pivotally move second jaw 48 away
from first jaw 38, thereby opening clamp 36. FIG. 10 illustrates
actuator cylinder 22 retracted toward a distal end 84 of welding
gun 76 to pivotally move second jaw 48 toward first jaw 38, thereby
closing clamp 36.
Referring to FIGS. 11 and 12, weld gun part clamp 36 may be
employed with an alternately configured welding gun alternate 86.
Welding gun 86 employs similar components and is similarly
configured as welding gun 12, and utilizes actuator 22 that
includes the linearly moving piston rod 24 illustrated in the prior
examples, but employs an alternately configured first moveable weld
arm 88. First weld arm 88 pivots about a rotational bearing 90 and
axis connected to side plates 16 toward an alternately configured
fixed second weld arm 92, as generally illustrated in FIGS. 11 and
12. FIG. 11 shows actuator cylinder 22 extended to pivotally move
second jaw 48 away from first jaw 38, thereby opening clamp 36.
FIG. 12 illustrates actuator cylinder 22 retracted toward a distal
end 94 of welding gun 86 to pivotally move second jaw 48 toward
first jaw 38, thereby closing clamp 36.
With reference to FIG. 13, an alternately configured weld gun part
clamp device 96 may be configured for grasping differently
configured parts using a single weld gun part clamp device 96. Weld
gun part clamp device 96 may be similarly configured to weld gun
part clamp device 10 (see FIGS. 1-4) and weld gun part clamp device
64 (see FIGS. 7 and 8), but includes an alternately configured weld
gun part clamp 98 combining the features of weld gun part clamp 36
of weld gun part clamp device 10 (see FIGS. 1-4) and weld gun part
clamp 66 of weld gun part clamp device 64 (see FIGS. 7 and 8). Weld
gun part clamp 98 may be configured to grasp two or more
differently configured parts without having to be modified.
Weld gun part clamp 98 includes an alternately configured first jaw
100 having a first jaw member 102 and a second jaw member 104.
First and second jaw members 102 and 104 may be configured as
elongate members rigidly connected to side plates 16 through common
fasteners 44 or another connection mechanism, for example, welding
and brazing. Jaw members 102 and 104 may be made from heavy gauge
steel. Other materials may also be employed. Although two separate
jaws members are illustrated, it shall be understood that the jaw
members may be made from a single piece and there may be fewer or
more jaw members to constitute first jaw 100. First jaw 100 may be
employed with one or more of the spot welding guns illustrated and
described throughout the application.
First jaw members 102 and 104 each include a first seat 106,
illustrated in the form of a triangle notch, for engaging a portion
of part 14 (see FIGS. 3 and 4). First seat 106 may be positioned
along first jaw members 102 and 104 in a similar position as first
seat 46 on first and second jaw members 40 and 42 of weld gun part
clamp 36 (see FIGS. 1 and 2). An upper portion of each jaw member
102 and 104 may be angled rearward toward proximal end 74 of
welding gun 12, similar to first jaw members 70 and 72 of weld gun
part clamp 66 (see FIGS. 7 and 8) to allow a larger or wider part
than part 14 to also be grasped and manipulated using the same weld
gun part clamp 98. A second seat 108 for engaging the larger part
may be similarly configured in the form of a triangle notch. Second
seat 108 may be located near a distal end 110 of first jaw member
102 and a distal end 112 of second jaw member 104.
With continued reference to FIG. 13, second jaw 48 may be
positioned opposite first jaw 100. Second jaw 48 includes third jaw
member 50, similar in configuration, positioned in opposing
orientation and made from similar materials, as first and second
jaw members 102 and 104. First jaw 100 and second jaw 48 form a
first throat 114 for receiving a part, for example part 14, and a
second throat 116 for receiving a differently configured second
part.
First jaw member 102 and second jaw member 104 may operate in a
similar manner as first jaw members 40 and 70 and second jaw
members 42 and 72 of weld gun part clamps 36 and 64, respectively.
Third jaw member 50 is connected to actuator piston rod 24 and
reciprocates along with piston rod 24 and first weld tip 28 between
a closed position to close a linear distance between first jaw 100
and second jaw 48 across throats 114 and 116, and an open position
to open the linear distance between first jaw 100 and second jaw 48
across throats 114 and 116. Weld gun part clamp 98 is illustrated
in the open position in FIG. 13.
This present invention reduces the number and types of robots
needed in a particular build station, reduces the number of
components and equipment that need to be supported and maneuvered
by the robot, reduces programming and coordination of additional
robots and actuators, reduces equipment cycle types thereby
increasing throughput of product, reduces congestion and logistics
issues inside the build station and significantly reduces costs,
and reduces number of components leading to less failures.
It is to be understood that the above description is intended to be
illustrative and not restrictive. Many embodiments and applications
other than the examples provided would be apparent to those of
skill in the art upon reading the above description. The scope of
the invention should be determined, not with reference to the above
description, but should instead be determined with reference to the
appended claims, along with the full scope of equivalents to which
such claims are entitled. It is anticipated and intended that
future developments will occur in the arts discussed herein, and
that the disclosed systems and methods will be incorporated into
such future embodiments. In sum, it should be understood that the
invention is capable of modification and variation and is limited
only by the following claims.
All terms used in the claims are intended to be given their
broadest reasonable constructions and their ordinary meanings as
understood by those skilled in the art unless an explicit
indication to the contrary is made herein. In particular, use of
the singular articles such as "a," "the," "said," etc. should be
read to recite one or more of the indicated elements unless a claim
recites an explicit limitation to the contrary.
The foregoing description relates to what is presently considered
to be the most practical embodiment. It is to be understood,
however, that the invention is not to be limited to the disclosed
embodiments but, on the contrary, is intended to cover various
modifications and equivalent arrangements included within the
spirit and scope of the appended claims, which scope is to be
accorded the broadest interpretation so as to encompass all such
modifications and equivalent structures as is permitted under the
law.
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